Donny...nice find. The BK-7m is certainly a nice module. But with the Ketron modules, from my limited experience, you get so much more. And granted, you pay for it. The live sound coming from the sd40 is something special.
The level of engineering put into the sd is on another level. I know your familiar with the sound...but this new line of Ketron modules makes them a force to be reckoned with.
Everyone else seems to shy away from the module market. Even the BK-7m is out of production (I believe). Ketron may be the only game in town to support guitarists and other midi module performers.
Good post Donny...you know where my heart is